EAN: 9781461478720

SPRINGERBRIEFS IN COMPUTER SCIENCE SECURITY F...

Cloud storage is an important service of cloud computing  which offers service for data owners
to host their data in the cloud. This new paradigm of data hosting and data access services
introduces two major security concerns. The first is the protection of data integrity. Data
owners may not fully trust the cloud server and worry that data stored in the cloud could be
corrupted or even removed. The second is data access control. Data owners may worry that some
dishonest servers provide data access to users that are not permitted for profit gain and thus
they can no longer rely on the servers for access control. To protect the data integrity in the
cloud  an efficient and secure dynamic auditing protocol is introduced  which can support
dynamic auditing and batch auditing. To ensure the data security in the cloud  two efficient
and secure data access control schemes are introduced in this brief: ABAC for Single-authority
Systems and DAC-MACS for Multi-authority Systems. While Ciphertext-Policy Attribute-based
Encryption (CP-ABE) is a promising technique for access control of encrypted data  the existing
schemes cannot be directly applied to data access control for cloud storage systems because of
the attribute revocation problem. To solve the attribute revocation problem  new Revocable
CP-ABE methods are proposed in both ABAC and DAC-MACS.

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